Watch The WWE Universe can always expect the unexpected when its time for one of WWEs marquee events. Here are 10 of the biggest surprise appearances to occur in the history of Royal Rumble or the Greatest Royal Rumble.Get your first month of WWE Network for FREE: http://wwenetwork.comSubscribe to WWE on YouTube: http://bit.ly/1i64OdTVisit WWE.com: http://goo.gl/akf0J4Must-See WWE videos on YouTube: https://goo.gl/QmhBof